I also bought LEDs but I think they're shitty qualty. However. I read that after turning your LED's off during the "night" you should turn on a low wattage HPS bulb for 30 minutes to simulate sunset because this supposedly needs 730nm which LEDs do not posses.

It could be bs since I'm not entirely satisfied with the LED-quality either and I read it on the sellers ebay site.

Check it out: eBay Winkel - HiddenHydro: Flowering under LED Grow Lights
mods, if this is seen as spam, I'm sorry and please delete